Rhythm builds sunlight generators — instruments that recreate the full strength and spectrum of the sun.
We weren't built for dim rooms and glowing screens.
For most of human history, sunlight guided every heartbeat, every breath, every rhythm of our lives. But modern life has dimmed that connection — offices, apartments, and phones have replaced the sky.
We now spend about 90% of our time indoors, under light that's too weak by day and too bright at night.
When you feel tired at noon and wide awake at midnight — when winter weighs heavy and summer feels like relief — that's your body calling out for light.
Millions of Americans — and hundreds of millions more around the world — suffer because they simply don't get enough.
It doesn't have to be this way.
Light, measured
The same light density as direct sunlight — indoors.
We build sunlight generators — powerful, precise instruments that recreate the full strength and spectrum of the sun. Our mission is simple: to ensure every person sustainably receives the light they need to feel happy, healthy, and well.
Because when you live in light that truly nourishes you, everything changes.
Technology
Rhythm machines are purpose-built to recreate sunlight. Every detail exists to reproduce the spectrum, intensity, and character of sunlight.
At the core of each system is the Rhythm light engine — a compact, high-output assembly that produces up to 60,000 lumens at 450 watts peak power at 90+ CRI, reaching 100,000 lux at 50cm from the source — the same light density as direct sunlight.
We selected a warm 2700K color temperature to reproduce the feeling of golden hour — the soft, amber light that signals sunrise and sunset.
Better cooling means more light. A copper vapor chamber draws heat away through phase-change conduction, while forced-air cooling with feedback control keeps temperatures stable under load. This efficiency allows higher luminous output, lower stress, and sustained performance over time.
Hand-built in San Francisco from aircraft-grade aluminum (5052) with a custom powder-coat finish. Premium high-CRI LEDs, industrial-grade power supplies, and precision cooling designed to run safely and silently for years.
The Rhythm Dial
A smooth, tactile controller. Sweep the dial and the room follows — no clicks, no steps, just light rising the way the sun does.
Set your light to rise with your morning and settle in the evening. Your space keeps a rhythm even when the sky outside doesn't.
No apps to open, no menus to learn. Brightness, schedules, and tuning all live in one smooth, tactile controller — reach over, turn, done.
Hand-built in San Francisco
Each Rhythm Sunlight Generator is hand-built in San Francisco from aircraft-grade aluminum with a custom powder-coat finish that looks and feels like fine furniture. Every part is chosen for performance and longevity — not a disposable gadget, but a lifelong piece of light.
Every Rhythm light comes with a lifetime warranty for the original owner. If anything goes wrong, we'll repair or replace it, free of charge — no hassle, no fine print.
Rhythm, in real spaces
Who we are
Rhythm was founded by Harrison Lin — a mechanical engineer, product designer, and sculptor who began this work during the long, dark months of the pandemic.
During this time, he felt the heaviness, the disconnection, the slow fading of energy and joy. To feel better, he built his first prototype. It wasn't perfect, but it worked.
From that beginning grew a team of designers and engineers united by a simple belief: that light is not just something we see, but something we feel.
Why we exist
If we're being honest, we don't want you to use our product.
Seriously.
If you want to feel better, go outside.
Let the sun warm your face.
Breathe.
Touch the earth.
It's the most natural way to feel better — and it's free.
But we also know that not everyone gets that chance.
Maybe you're stuck indoors sunrise to sunset. Maybe it's a dark and gray winter. Maybe you're just too tired to go out.
We get it.
That's why Rhythm exists — to reconnect people with real, nourishing light their bodies and minds were designed to thrive on.
Go outside whenever you can.
For all the times you can't, Rhythm is here for you.
$2,400 · Ships November 2026
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